N7110 + Ubuntu 11.10

Hi,

I'm having problems installing Ubuntu 11.10 on my Inspiron N7110. The BIOS version is A07. What happens is that after booting from USB (or CD, doesn't matter), and then showing the purple screen with the small logo at the bottom, the screen goes black and stays there forever. Now if I press any key in the purple screen, I can enter the installer options, press F6 and select acpi=off. This solves the problem completely, but I consider that a hack and I would like to install Ubuntu out of the box.

Any suggestions?